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Image quality measurement in the frequency domain

机译:频域中的图像质量测量

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摘要

In this paper a novel frequency domain technique estimating the significance of blocking artifacts in images coded using the Discrete Cosine Transform is proposed. First a gradient image is computed which is then split into blocks. For each block, the blocking artifacts in the horizontal and vertical directions are detected by comparing ratios obtained from harmonics in each block with the corresponding ratios in the same block of the reference image. An image quality metric based on the significance of the differences of the ratios between the test picture and the reference picture for each block is introduced.
机译:在本文中,提出了一种新的频域技术,该技术可估计使用离散余弦变换编码的图像中的块状伪像的重要性。首先计算梯度图像,然后将其分成块。对于每个块,通过比较从每个块中的谐波获得的比率与参考图像的同一块中的相应比率来检测水平和垂直方向上的块状伪像。引入了基于每个块的测试图片和参考图片之间的比率的差异的重要性的图像质量度量。

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